DNS delegation of google.ir updated: May 23, 2013 10:08:25 AM
Delegation
step
query
auth
servers
1
google.ir.
.
(l,b,c,i,h,m,d,e,k,a,g,j,f).root-servers.net.
2
google.ir.
ir.
ns.irnic.ir. ns5.univie.ac.at. a.nic.ir.
3
google.ir.
google.ir.
(ns2,ns1,ns3,ns4).google.com.
We pick l.root-servers.net, one of the 13 root servers (1), and ask it about google.ir and learn that ir is delegated to three name servers (2), so we ask ns.irnic.ir where we learn that google.ir is delegated to four name servers, including ns2.google.com (3), so we ask that one and get the following answer: